What is the objective of import tariff? Explain and illustrate graphically how import of a commodity imposed with import tariff is affected? What are its other effects? What is the objective behind...

What is the objective of import tariff? Explain and illustrate graphically how import of a commodity imposed with import tariff is affected? What are its other effects? What is the objective behind the grant of export subsidy? Illustrate graphically how export of commodity provided with export subsidy is affected? What are financial implications of export subsidy?